java – 如何将HTML转换为文本保持换行符

public static String htmlToText(InputStream html) throws IOException {
    Document document = Jsoup.parse(html,null,"");
    Element body = document.body();

    return buildStringFromNode(body).toString();
}

private static StringBuffer buildStringFromNode(Node node) {
    StringBuffer buffer = new StringBuffer();

    if (node instanceof TextNode) {
        TextNode textNode = (TextNode) node;
        buffer.append(textNode.text().trim());
    }

    for (Node childNode : node.childNodes()) {
        buffer.append(buildStringFromNode(childNode));
    }

    if (node instanceof Element) {
        Element element = (Element) node;
        String tagName = element.tagName();
        if ("p".equals(tagName) || "br".equals(tagName)) {
            buffer.append("n");
        }
    }

    return buffer;
}